[1]Scott, Virgil E. Characteristics of ponderosa pine snags used by cavity-nesting birds. U.S. Fish and Wildlife Service, Fort Collins, Colorado.
[2]Scott, Virgil E. [In prep.] Bird response to snag removal. U.S. Fish and Wildlife Service, Fort Collins, Colorado.
[3]Snag or tree use: A: food B: nest C: perch.
[4]Major foods: 1: birds 2: rodents 3: reptiles and amphibians 4: insects 5: seeds and fleshy fruits 6: vegetation 7: other or little known.
[5]Threatened or endangered species.
[6]Wildlife biologist, U.S. Fish and Wildlife Service, Fort Collins, Colorado.
[7]Ecology Department, Colorado State University, Fort Collins, Colorado.
[8]Zoology Department. Colorado State University, Fort Collins.
[9]DeWeese, Lawrence R., Charles J. Henny, Randy L. Floyd, Kathie A. Bobal, and Albert W. Shultz. U.S. Fish and Wildlife Service. Impact of Trichlorfon (Dylox) and Carbaryl (Sevin-4-oil) on breeding birds in southwestern Montana forests.
